Want Dodge Ram MegaCab Model.

AMT Made a promo style extended cab.  With a couple of these and some putty a mega cab could be made.  Unfortunately it's the earlier like 2000 styling instead of the current styling.  Assuming your new rig is the new styling.  There was also dually versions of this made.  There is also a Ram VTS Truck which is full detail that could also be made into a mega cab with a couple of kits, and some styrene.  I believe Modelhaus has appropriate wheels and tires, or at least they used to.  Might want to give them a call, I assume they are still in business.

  Have you asked the dealer you bought it from if they have Mega-Cab promos?

So I'm guessing there are none.

 

Unfortunately, I'm not creative enough to be able to make one myself.